JPS62172513A - Manufacture of multiple magnetic head - Google Patents

Abstract

PURPOSE:To easily obtain a highly accurate head by fitting a coil wound in advance to a base formed incorporatedly in advance, fitting a crystal and an insulation plate being insulators to the head and adhering and fixing the base and the head on one face. CONSTITUTION:Three grid from recesses 9 to form plural projections in the lengthwise direction are provided in the broadwise direction to a rectangular prism magnetic base 13 and the coil 22 wound in advance is fitted to the middle projections 11. In order to form three projections in the broadwise direction and plural projections 10 in lengthwise direction, recesses 17 with a slope at the bottom in the lengthwise direction and plural recesses 21 in the broadwise direction are formed, a long groove 19 is provided at the middle part of the recesses 17 of the bottom with a slope are provided and an insulator 20 is fitted. The head of the base 13 fitted with the insulator 23 having a dimension reaching the base recess is adhered and fixed to the split groove 21 of plural number in the broadwise direction and the base 13 and the head insulation plate 23 are cut off at cut faces 24, 25 as shown in dotted lines to obtain each unit magnetic head.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a multiple magnetic head.

[Conventional technology]

A conventional example will be explained below with reference to the drawings.

7 to 9 are perspective views illustrating a conventional method of manufacturing a multiplex magnetic head.

In the figure, reference numeral 1 denotes a central base formed into a rectangular parallelepiped made of a ferrite core chip with a coil already wound around it, and 2 denotes a side base made of a ferrite core chip like the central base 1, and having a long protrusion 3 and a chimney part 4.

The central base 1 is held between the long protrusion 3 and the short part 4 of the side base 2 from both sides, and the space between the short part 4 and the central base 1 is 1! A thin piece of P3 edge body 6 made of a non-magnetic material is held and adhesively fixed to J5,
A magnetic head 7 is manufactured. Magnetic helad 7 and magnetic head 7
A multi-magnetic head was manufactured by laminating an insulating plate 8 between the two layers with adhesive.

[Problem that the invention seeks to solve]

However, the manufacturing method described above requires high precision for each component, making manufacturing a difficult task.

Assembly requires advanced technology, and when gluing each part, the accuracy of the product decreases due to the coefficient of thermal expansion depending on the amount and thickness of the adhesive. A single magnetic head made of a combination of a non-magnetic material and a magnetic material has many adhesive parts, so the front surface of the head and the front surface of the head are not aligned, making accurate assembly impossible.

In addition, in order to stack the assembled magnetic heads in multiple layers, it is necessary to sandwich the plate-shaped non-magnetic material and fix it with adhesive. However, there is a problem in that it is difficult to manufacture a highly accurate multi-magnetic head because the magnetic head is inserted too much into the next disk.

[Means for solving problems]

In order to solve the above problems, the present invention provides the following means.

A lattice-like recess is provided in a long rectangular parallelepiped magnetic body to form protrusions in three rows in the width direction and multiple in the longitudinal direction, and a pre-wound coil is fitted into the protrusion in the middle of the recess. Create in advance.

Also, made of the same material, a bottomed inclined recess is provided in the longitudinal direction at a lower height than the base body, a long groove is provided near the middle, and an insulator is fitted into the groove.

In the longitudinal direction of the head where the insulator is fitted (in the longitudinal direction), create a dividing groove with the same depth as the groove where the insulator is fitted, and insulate the insulation having dimensions to fit into the dividing groove with the base recess. Glue and fix the board.

The head and the protrusions of the base are bonded and fixed together, and both sides are cut to expose the insulator and the insulating plate to produce a multiplex magnetic head.

[Effect]

According to the present invention, a pre-wound coil is fitted onto a pre-formed base body, thereby eliminating the need for molding each part and the number of scrap removal operations.Similarly, the magnetic body is also processed into a pre-integrated shape for the head. Then, a long insulator was fitted into the groove in the longitudinal direction of the recess, and insulating plates with dimensions up to the base were fitted into the multiple dividing grooves in the width direction, making it as easy to work as the base. .

By bonding the base and the head and cutting the exposed surface of the insulator and insulating plate, the number of parts is reduced and the number of bonding parts is eliminated, making manufacturing easy. A highly accurate multiple magnetic head can be created.

〔Example〕

Hereinafter, embodiments will be described according to the drawings.

FIG. 1 is a perspective view showing one embodiment.

FIG. 2 is a perspective view showing the magnetic material of the base of one embodiment,
Based on a long rectangular parallelepiped, a recess 9 is provided at a depth from the middle in the longitudinal direction to a position inside the other side surface, and the recess 9 has protrusions 10 on both sides. A central protrusion 11 is formed.

A plurality of protrusions 10 on both sides perpendicular to the longitudinal direction. Central protrusion 11f:
A dividing groove 12 is provided for dividing.

The dividing groove 12 is cut deeper than the recess 9 in the longitudinal direction of the base body 13.

FIG. 3 is a perspective view showing the magnetic body of the head 14 of one embodiment, and is a perspective view showing a rectangular parallelepiped having the same width as the base 13,
Side protrusions 15. are made of the same material as the base body 13 on both longitudinal sides and in the center. A central protrusion 16 is formed, and a groove 19t having a predetermined depth and the same width is formed in the side walls 18 on both sides of one end of the inclined bottom surface of the nine recesses 1T, and a crystal serving as an insulator 20 is fitted into the groove 19. match.

Both side walls 18 of the central protrusion 16 and the end faces of the insulator 20 exposed on the bottom floor of the recess 17 are bonded and fixed.

Side projections 15 on both sides in the longitudinal direction. A dividing groove 21 for dividing the central protrusion 16 in the longitudinal direction is provided to have a depth equal to the depth into which the insulator 20 is fitted.

Note that the dividing groove 12 provided in the base body 13 is made wider than the dividing groove 21 of the head 14 in consideration of the coil winding thickness described below.

FIG. 4 is a perspective view showing the assembly of the base body 13 of FIG. 2, in which a pre-wound coil 22 is fitted onto the divided central protrusion 11.

FIG. 5 is a perspective view showing the assembly of the head 14 of FIG. The insulating plate 23 is fitted.

FIG. 6 is a perspective view showing the assembly of one embodiment, and shows the side protrusions in each side of the base body 13 and head 14 assembled in FIGS. 4 and 5.
, IS central protrusions 11 and 16 are fixed with adhesive, and the insulator 20 and the insulating plate 23 are cut at arbitrary surfaces 24 and 25 at both ends to expose the multiplex magnetic head 2G.

〔Effect of the invention〕

As explained in detail above, according to the present invention, a multi-magnetic magnetic I got hit by the head.

In the present invention, a magnetic material and a non-magnetic material are made in the assembled shape in advance, a pre-wound coil is fitted to the central protrusion of the base, and an insulating crystal and an insulating plate are attached to the head part. Since the base body and the head are fixed together with adhesive on one side, the accuracy of the product is not reduced due to the amount of adhesive or the coefficient of thermal expansion of the adhesive, and the straight line shape where the insulator fits can be fixed. The magnetic head can be formed in a straight line, the number of parts can be reduced, and an inexpensive multiplex magnetic head can be manufactured.

Furthermore, when crystal is used as an insulator, its hardness is similar to that of magnetic material (ferrite), so wear is uniform and accuracy can be maintained over a long period of time. Since there is no variation in the lines of the joining surfaces of each part, accurate combinations can be made, and the parts are produced in one piece, this has the effect of greatly improving accuracy.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment, FIG. 2 is a perspective view showing a base of a multiplex magnetic head according to one embodiment, and FIG. 3 is a perspective view showing a head of a multiplex magnetic head according to one embodiment. Figures 4 to 6 are perspective views showing the assembly order of one embodiment, and Figures 7 to 9.
The figure is a perspective view showing the assembly of a conventional example. 1... Central base 2... Side base 3... Long protrusion
4...Chimney part 5...Gap 6...Insulator 7.
...Magnetic head 8...Insulating plate 9...Concavity 10.
...Side protrusion 11...Central protrusion 12...Dividing groove
13...Base 14...Head 15...Side protrusion
16...Central protrusion 1T...Recess 18...Side wall
19...Groove 20...Insulator 21...Dividing groove
22...Coil 23...Insulating plate 24.25...
- Cutting surface 26...Multiple magnetic head.

Claims (1)

[Claims] 1. A lattice-shaped concave portion for forming protrusions in three rows in the width direction and a plurality of protrusions in the longitudinal direction is provided in a long rectangular parallelepiped magnetic body, and the intermediate protrusions formed from the concave portions are preliminarily formed. A base body into which a wound coil is fitted, a bottomed inclined recess in the longitudinal direction to form protrusions in three rows in the width direction and a plurality of recesses in the width direction, and the bottomed inclined recesses are formed in the width direction. A long groove is provided in the middle of the recess and an insulator is fitted therein, and a head of a magnetic material fitted with an insulating plate with a size that reaches the recess of the base is glued into the plurality of dividing grooves in the width direction. A method for manufacturing a multiplex magnetic head, characterized in that the head is fixed and cut at a surface where the insulating plate and insulator of the base and the head are exposed. 2. A multiple magnetic head according to claim 1, characterized in that the magnetic material is ferrite and the insulator is crystal.